Bag chair for bag filling machines



Jan. 22, 1935. I

K. STAHM BAG CHAIR FOR BAG FILLING MACHINES Filed Oct. 10, 1931 "2 Sheets-Sheei 1 INVENTOR Karl Sta/2m BY 5 .c. Scnmlrmk ATTORNEY Jan. 22 1935.

K. STAHM 1,988,705 BAG CHAIR FOR BAG FILLING MACHINES Filed Oct. 10, 1931 2 Sheets-Sheet 2 INVENTOR 25' Karl 51'077/77 Swim ATTORNEY Patented Jan. 22, 1935 UNITED STATES BAG CHAIR .FOR

1,988,705. BAG FILLING MAQHINES PATENT FICE Karl Stahm, Turners Falls, Mass., assignor to Andreas, G. in. b. H., Munster, Germany, a

German company Application October 10, 1931, Serial No. 568,010

7 14 Claims.

" invention relates to bag chairs for bag filling machines, and particularly to such chairs for supporting the bottoms of paper bags which have seams projecting outwardly from the portionsthereof which receive the contents. These bagswould be apt to be damaged if rested upon chairs with fiat seats. The present invention aims to provide an improved chair including a novel slot construction, adapted especially for such bags and for use in machines in which the bag. is jogged during filling and discharged upon tilting of the chair, but also capable of support-- ing other types of bags upon machines. v v

More specifically, then, one object of the invention is-to make provision in a slotted bag chair for facilitating the positioning oftbags for support by the chair, and foraiding in retain ing the bagsin this position especially priorto the commencement of the. filling operation and during the first part thereof, as is especially important in machines of the type described in the copendingapplications Arno Andreas Serial Nos. 419,986 and 570,330, whereinthe bag chair is jogged continuously, orv inother words, not only when. substantialmaterial is in the bags, but while they are being put in place and while they' arecomparatively empty. Another object is to provide a bag chair construction adapted t0 permit the. Operator readily to place bags thereon whilelstan'ding at one side thereof, convenient to a stack of, empty bags, which chair is particularly suited to machines including several units arranged in bank, for control by a single operator preferably standing in one positionfA further object is to devisea' bag chair which is capable of insuring the discharge of bags therefrom when tilted, especially when the weightof material in the bag is to effect the discharging action.

"Still another purpose of the invention is to devise a construction embodying these advantages, which, at the same time, partly by rea-' son of, anovel slot construction, avoidsinjury to thebagirom the jogging, although the bottom of the bag is jogged, and also avoids the sticking or wedging'of thebag'in the slot as the bagi'fills and expands. I

Moreover, the invention aims toyprovide such a chair in which openings are formed for disposing of dust which collects'in the slot when the bags are being filled with powdered material, which openings shall not interfere with the placing of bags in filling position.

Another object is to provide a bag chair emvarious types of bodying these advantages which shall'be simple and inexpensive to manufacture and of sturdy construction.

These and other objects and advantages of my invention willbefmore apparent from a pre-f ierred embodiment thereof which will now. be described, reference being .had. to the accome, panying drawings, wherein:

Fig. 1 is a side elevation, of bag filling mecha nism, partly in section. Fig. 2 is a plan view, mainly diagrammatic, .of the construction shown in Fig. 1. Figs. 3 and4 are detail plan'views of the bag chairs, shown in Fig. 2. Fig. 5 is-a' front elevation of the chair shown in Fig. 3, and Fig. 6 is a section on the line (i -6.of Fig. 3- looking in the direction of the arrows. In Fig. 1 there is shown mechanism .for supp rting a bag and for jo gin itywhile fillin it with finely divided material. This construe-j tion is. described and claimed in copendins applia cation serialNo. 570,330, and hence will, only be described here in suflicient detail to explain its principal features and operation, inasmuch asmy present bag chair construction is. especially adapted for use with such a machine, although it is, as stated above,.capab1e of use in connection with other bag filling machines. p

- There is shown at 1 a hopper for feeding finely divided material. to, a turbine 2 ,'the latter operating to impel the'material through a spout 3 into valve bag This bag isshownas the seamed type, having seams 4a and 4b. The bag is supported on a bag I chair 5 which may be carried on normally upright arms 6 by meansof ears 7. having teeth 8 for engagement with teeth 9 on said .arms. These. arms 6 are shown pivoted. on a jogging arm 10 which,. in turn, is pivoted'at 11 and is. jog ed, throughroller 12 by cam 13... The forward end of thejogging arm is shown provided with a downwardly extending portion 14 for abutment against stop-15, so that the .cam visrelieved of the force dueitodropping of the bag chair. For. discharging a bag from the bag chair in this construction; the upright arms 6 tilt forwardly and the construction is preferably, such that the; resultant center of gravity of the chair and a bag thereon.contain.-v ing material is forwardofthe pivot of the arms so. thatthe discharge is accomplished without substantial eifort on the part of the operator, who is merely required to release a latch, as hereafter indicated. Fornormallyretaining the arms 6 in generally upright position there-is provided mechanism which does not interfere with the'jogging and which is tree to operate rights 17. GA bag clamp 21 serves to retain the bag on the spout and is releasable by handle 22 through arm 23 and set screw 24,'the' latch 18 also being operated by the-handle throughilink I because the jogging' tends to displace the bag,

25. As the bag is discharged it'falls onto con veyor 26 for carrying it to any desired point.

The operator stands on platform -2-7- and;--mayrest his back against support 28.

Referring now to Figs. 3, 5 and Gfthe-bag chairis shown as consisting generally of aseat portion 30 which is adapted to support a bag, and 'a slot 31', in'which the seam of the bag may reside. ,Asshown in Fig. 1, the seat 30 of the 'bag chair isinclined slightly downwardly and forwardly, or mother words, downwardly from the rear portion of the chair toward the front, a construction whichmaterially aids in discharg ing the bag when vthe chair is tilted. However.

1 this. is not essential in instances where the tilting alone is sufficient to cause the discharge. Nevertheless, thefinclination of the seat 30 does aid" in this" actiori... This'inclination may be efiectedas shown by simply forming the ears 7' at the desired angle to'the bag chair or by caste ing the seatfat the, predetermined angle with respect'to the rest of the chair, though it may alsobe accomplished by constructing the machine'so that its upper portion is located as shown in Fig. 1, while its lower portion including the pivot 11' and the parts carried thereon are moved, slightly rearward, or to the left in this figure, thus inclining the arms 6 and 17.

j 'The slot 31 is preferably formed with side walls .32 which flare downwardly and outwardly and are connectedjbetween their lower ends by a bottom wall;33 one purpose of this construction being tojprovide for ready positioning of the bags with respect to the chair and at the same time to permit thejformation'of openings 34'inthe bottom ofjthe. slot for the escape of dust which is apt to settle therein when bags are being filledwith materials such as cement, which openings do not interfere with the bags as they are beingput in place. It will be appreciated that in order to'make' most efficient use of the machine and also of the 'operators time, each bag must'fbe put in place rapidly.. .Hence, the construction of the chair so as not to interfere with or impedejthis operation is important, and

, of the bag would be apt to catch in any unevenness in the slot. 'Ihus, openings in the bottom ofthe'slot would ordinarily tend to interfere with orat least delayjthe bag positioning operation. I-Io'wever,by means of the flanged walls, the-bag is guided centrally of the slotbythe walls-at-'the narrow portion'of the slot, while .inclinedownwardly away from the operator, as

their valves areplaced over the spout. It is particularly important where the bag is jogged,

especially before the top of it is clamped, and the inclined bottom-of the slot serves to prevent this action.

For a number of reasons not necessary to be enumerated here, it is highly desirable that bag filling machines include several units, generally three'or four, for operation by a single attendant who should not be required to move around more than necessary. In Fig. 2, I have shown a machine including four bag chairs, each for cooperation with a filling unitas illustrated in Fig. 1. I have found that when the operator is placing bags on a number of units, his work is simplified and speeded up if the slots in the bag chairs are extended diagonally laterally from the front of the chairs to the back, preferably so that the ends of the slot are on'opposite sides of the spout. Contrary to expectations, this slot construction does not interfere with the filling of the bag or with its location on the spout. For instance, the operator standing on platform 27 andleaning against back rest 28 can take a bag from pile'41 on table 40, and place it on the left-hand unit in Fig. 2. In this way he finds it natural and convenientto have the slot diagonally located, as shown. He next takes another bag from pile 41 and placesit on the unit next to theleft, this slot being alsoisuitably inclined to accommodate the bag as the'operator natur-I ally reaches forward with it. So also, with the unit next to the right-hand end. For the unit at the right-hand end the operator may take a bag from the pile 42 on the other end of the table. It will be noted that in this construction, at least one of the slots is extended diagonally in one direction, while the other slots take the opposite direction and it will be appreciated that. this simplifies the motions of the operator considerably. I

In constructing the bag chairs in accordance with the invention they may be cast as a single piece, including the ears. In other words, the seat, bottom wall of the slot, and side walls of the slot as well as the means for securing the chair to the machine may all be integral; In this way a simple, sturdy construction is obtained.

The terms and expressions which I have employed are used as terms of description and not of limitation, and I have no intention, in the use of such terms and expressions, of excluding any equivalents of the features shown and described or portions thereof, but recognize that various modifications are possible within the scope of the invention claimed.

I claim:

' 1. In a machine for filling bags, a supporting chair for the bag including a slot formed therein, and a bottom below the slot sloping toward the rear of the chair, the slot as a whole extending diagonally from front to rear.

2. In a machine for filling bags, a supporting chair for the bag including a slot formed therein, downwardly diverging walls forming sides of the slot, and a bottom below the slot sloping toward the rear of the chair, the slot as a whole extending diagonally from front to rear.

3. In a machine for filling bags, a chair for supporting the bag including a seat portion having a slot formed therein and a bottom below the slot sloping from front to rear of the chair.

4. In a machine for filling bags, a chair for supporting the bag including a seat portion having a slot formed therein and a bottom below the slot sloping from front to rear of the chair, the seat sloping in the opposite direction.

5. In a machine for filling bags with finely divided material, a bag support including a. seat having a slot formed therein, walls extending downwardly from the seat at the sides of the slot a bottom joining the lower ends of the walls, and openings in the bottom adjacent the walls.

6. In a bag filling machine, a bag-supporting chair having a slot formed therein, downwardly diverging walls forming sides of the slot; a bottom joining the walls of the slot, and said walls diverging to a substantial degree.

7. In a bag filling machine having a plurality of units each including a spout for discharging material into a bag, a chair for supporting each bag and provided with a slot, the slot in the chair at one end of the machine extending diagonally from front to rear toward that end of the machine, and the slot in the chair at the other end of the machine extending diagonally from front to rear toward that end of the machine.

8. In a bag filling machine, a chair for supporting the bottom of a bag and including a seat portion, a slot formed therein, downwardly extending walls at either side of the slot, and a bottom joining said walls and inclined from front to rear of the chair.

9. In a bag filling machine, jogging means to support the bottom of a bag for filling and including a bag chair adapted to tilt for discharging the bag, said chair having a seat portion, a

slot formed therein, downwardly extending walls at either side of the slot, and a bottom joining said walls and inclined from frontto rear of the chair.

walls at either side of the slot, and a bottom joining said walls and inclined from front to rear of the chair, said seat portion being inclined in the opposite direction.

11. In a bag filling machine, a bag chair having a seat portion with a slot formed therein, downwardly diverging walls forming sides of said slot, anda bottom joining said walls below said seat portion, said chair having dust escape openings communicating with said slot below saidseat portion and laterally displaced with respect to the edges of the slot in said seat portion.

12. In a machine for filling bags, a bag chair having a seat portion inclined downwardly from the rear to the front of the chair, said seat portion having a slot formed therein, downwardly extending diverging walls forming sides of said slot and a bottom joining said walls beneath said seat portion and sloping downwardly from the front to the rear of the chair.

13. In a machine for filling bags, a bag supporting chair having a seat portion inclined downwardly toward the front of the chair when in bag filling position.

14. In a bag filling machine, a bag chair having a slot formed therein, downwardly extending walls for said slot, a bottom joining the lower portion of the walls of the slot, said bottom subsfatntially exceeding in width, the width of said s o v KARL STAHM. 

